I remember my old suby, used to over heat almost sitting in traffic, had no power anything and no a/c, was a real bastard to drive in hot traffic. I was even affraid of drive-thrus!!
Now though, the ED is amazing, it actually gets cooler if it sits still. The highest the temp guage has been was between the O and R on NORMAL. Every other day its below or on N. Idling it drops below N too.